package com.sky.service.impl;


import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.CollectionUtils;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
public class OrderServiceImpl implements OrderService {

    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private WeChatPayUtil weChatPayUtil;
    @Autowired
    private WebSocketServer webSocketServer;


    /**
     * 提交订单
     *
     * @param ordersSubmitDTO
     * @return
     */
    @Transactional
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {
        //处理业务异常（地址簿为空，购物车为空）
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if (addressBook == null) {
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }

        //查询当前用户购物车数据
        Long userId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(userId);
        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);
        if (list == null || list.size() == 0) {
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }

        String address = addressBook.getProvinceName() + addressBook.getCityName()
                + addressBook.getDistrictName() + addressBook.getDetail();
        //向订单表插入一条数据
        Orders order = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO, order);
        order.setOrderTime(LocalDateTime.now());
        order.setPayStatus(Orders.UN_PAID);
        order.setStatus(Orders.PENDING_PAYMENT);
        order.setNumber(String.valueOf(System.currentTimeMillis()));
        order.setPhone(addressBook.getPhone());
        order.setConsignee(addressBook.getConsignee());
        order.setUserId(userId);
        order.setAddress(address);
        orderMapper.insert(order);


        //向订单明细表插入n条数据
        List<OrderDetail> orderDetailList = new ArrayList();
        for (ShoppingCart cart : list) {
            OrderDetail orderDetail = new OrderDetail();
            orderDetail.setOrderId(order.getId());
            BeanUtils.copyProperties(cart, orderDetail);
            orderDetailList.add(orderDetail);
        }
        orderDetailMapper.insertAll(orderDetailList);

        //清空当前用户的购物车
        shoppingCartMapper.clean(userId);

        //封装VO返回结果
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(order.getId())
                .orderTime(order.getOrderTime())
                .orderNumber(order.getNumber())
                .orderAmount(order.getAmount())
                .build();

        return orderSubmitVO;
    }

    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

        JSONObject jsonObject = new JSONObject();
        jsonObject.put("code", "ORDERPAID");

        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));

        // 替代微信支付成功后的数据库订单状态更新，直接在这里更新了
        // 根据订单号查询当前用户的该订单
        Orders ordersDB = orderMapper.getByNumberAndUserId(ordersPaymentDTO.getOrderNumber(), userId);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        orders.setStatus(Orders.TO_BE_CONFIRMED);
        orders.setPayStatus(Orders.PAID);
        orders.setCheckoutTime(LocalDateTime.now());

        orderMapper.update(orders);

        //通过webSocket向客户端浏览器推送消息
        Map map = new HashMap();
        map.put("type", 1);//1表示来单提醒，2表示客户催单
        map.put("orderId", ordersDB.getId());
        map.put("content", "订单号" + ordersPaymentDTO.getOrderNumber());
        String jsonString = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(jsonString);

        return vo;
    }

    /**
     * 客户催单
     *
     * @param id
     */
    @Override
    public void reminder(Long id) {
        Orders order = orderMapper.getById(id);
        if (order == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        HashMap map = new HashMap();
        map.put("type", 2);//2表示客户催单
        map.put("orderId", id);
        map.put("content", "订单号：" + order.getNumber());
        String jsonString = JSON.toJSONString(map);
        //通过webSocket向浏览器推送消息
        webSocketServer.sendToAllClient(jsonString);
    }

    /**
     * 查询历史订单
     *
     * @return
     */
    @Override
    public PageResult historyOrders(Integer pageNumber, Integer pageSize, Integer status) {
        PageHelper.startPage(pageNumber, pageSize);
        OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        ordersPageQueryDTO.setStatus(status);
        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);
        List<OrderVO> list = new ArrayList();
        // 查询出订单明细，并封装入OrderVO进行响应
        if (page != null && page.getTotal() > 0) {
            for (Orders orders : page) {
                Long orderId = orders.getId();// 订单id

                // 查询订单明细
                List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(orderId);

                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                orderVO.setOrderDetailList(orderDetails);

                list.add(orderVO);
            }
        }
        return new PageResult(page.getTotal(), list);
    }

    /**
     * 查询订单详情
     *
     * @param id
     * @return
     */
    @Override
    public OrderVO orderDetail(Long id) {
        Orders orders = orderMapper.getById(id);

        // 查询该订单对应的菜品/套餐明细
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());

        // 将该订单及其详情封装到OrderVO并返回
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders, orderVO);
        orderVO.setOrderDetailList(orderDetailList);

        return orderVO;
    }

    /**
     * 取消订单
     *
     * @param id
     */
    @Override
    public void cancelOrder(Long id) {
        Orders ordersDB = orderMapper.getById(id);
        if (ordersDB == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        //订单状态 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消
        if (ordersDB.getStatus() > 2) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        // 订单处于待接单状态下取消，需要进行退款
        if (ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            //调用微信支付退款接口
            //
            //支付状态修改为 退款
            orders.setPayStatus(Orders.REFUND);
        }

        // 更新订单状态、取消原因、取消时间
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason("用户取消");
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 再来一单
     *
     * @param
     */
    @Override
    public void repetitionOrder(Long id) {
        // 查询当前用户id
        Long userId = BaseContext.getCurrentId();

        // 根据订单id查询当前订单详情
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);

        // 将订单详情对象转换为购物车对象
        List<ShoppingCart> shoppingCartList = new ArrayList<>();
        for (OrderDetail orderDetail : orderDetailList) {
            ShoppingCart shoppingCart = new ShoppingCart();
            BeanUtils.copyProperties(orderDetail, shoppingCart);
            shoppingCart.setId(null);
            shoppingCart.setUserId(userId);
            shoppingCart.setCreateTime(LocalDateTime.now());
            shoppingCartList.add(shoppingCart);
        }

        // 将购物车对象批量添加到数据库
        shoppingCartMapper.insertBatch(shoppingCartList);
    }

    /**
     * 搜索订单
     *
     * @param ordersPageQueryDTO
     * @return
     */
    @Override
    public PageResult conditionSearchOrder(OrdersPageQueryDTO ordersPageQueryDTO) {
        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());
        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);
        List<OrderVO> list = getOrderVOList(page);
        return new PageResult(page.getTotal(), list);
    }

    /**
     * 统计订单状态
     *
     * @return
     */
    public OrderStatisticsVO statistics() {
        OrderStatisticsVO vo = orderMapper.getStatusCount(Orders.TO_BE_CONFIRMED, Orders.CONFIRMED, Orders.DELIVERY_IN_PROGRESS);
        return vo;
    }

    /**
     * 接单
     *
     * @param
     * @return
     */
    public void confirmOrder(OrdersConfirmDTO ordersConfirmDTO) {
        ordersConfirmDTO.setStatus(Orders.CONFIRMED);
        orderMapper.confirmOrder(ordersConfirmDTO);
    }

    /**
     * 拒单
     */
    @Override
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) {
        Long id = ordersRejectionDTO.getId();
        String rejectionReason = ordersRejectionDTO.getRejectionReason();
        Orders orders = orderMapper.getById(id);
        if (orders == null || orders.getStatus() != Orders.TO_BE_CONFIRMED) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        if (orders.getStatus() == Orders.TO_BE_CONFIRMED) {
            orders.setCancelTime(LocalDateTime.now());
            orders.setPayStatus(Orders.REFUND);
            orders.setStatus(Orders.CANCELLED);
            orders.setRejectionReason(rejectionReason);
            orderMapper.update(orders);
        }
    }


    /**
     * 取消订单
     */
    @Override
    public void cancel(OrdersCancelDTO ordersCancelDTO) {
        Long id = ordersCancelDTO.getId();
        String cancelReason = ordersCancelDTO.getCancelReason();
        Orders orders = orderMapper.getById(id);

        orders.setCancelTime(LocalDateTime.now());
        orders.setPayStatus(Orders.REFUND);
        orders.setStatus(Orders.CANCELLED);
        orders.setRejectionReason(cancelReason);
        orderMapper.update(orders);
    }

    /**
     * 订单派送
     * @param id
     */
    @Override
    public void delivery(Long id) {
        Orders orders = orderMapper.getById(id);
        if (orders == null || orders.getStatus() != Orders.CONFIRMED) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Orders ordersDB = new Orders();
        ordersDB.setStatus(Orders.DELIVERY_IN_PROGRESS);
        ordersDB.setId(id);
        orderMapper.update(ordersDB);
    }

    /**
     * 完成订单
     * @param
     * @return
     */
    @Override
    public void complete(Long id) {
        Orders orders = orderMapper.getById(id);
        if (orders == null || orders.getStatus() != Orders.DELIVERY_IN_PROGRESS) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Orders ordersDB = new Orders();
        ordersDB.setStatus(Orders.COMPLETED);
        ordersDB.setId(id);
        orderMapper.update(ordersDB);
    }

    /**
     * 将分页查询的结果封装成一个可以返回给前端的VO对象的List集合
     *
     * @param page
     * @return
     */
    private List<OrderVO> getOrderVOList(Page<Orders> page) {
        // 需要返回订单菜品信息，自定义OrderVO响应结果
        List<OrderVO> orderVOList = new ArrayList<>();

        List<Orders> ordersList = page.getResult();
        if (!CollectionUtils.isEmpty(ordersList)) {
            for (Orders orders : ordersList) {
                // 将共同字段复制到OrderVO
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                String orderDishes = getOrderDishesStr(orders);

                // 将订单菜品信息封装到orderVO中，并添加到orderVOList
                orderVO.setOrderDishes(orderDishes);
                orderVOList.add(orderVO);
            }
        }
        return orderVOList;
    }

    /**
     * 根据订单id获取菜品信息字符串
     *
     * @param orders
     * @return
     */
    private String getOrderDishesStr(Orders orders) {
        // 查询订单菜品详情信息（订单中的菜品和数量）
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());

        // 将每一条订单菜品信息拼接为字符串（格式：宫保鸡丁*3；）
        List<String> orderDishList = orderDetailList.stream().map(x -> {
            String orderDish = x.getName() + "*" + x.getNumber() + ";";
            return orderDish;
        }).collect(Collectors.toList());

        // 将该订单对应的所有菜品信息拼接在一起
        return String.join("", orderDishList);
    }

//    /**
//     * 订单支付
//     *
//     * @param ordersPaymentDTO
//     * @return
//     */
//    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
//        // 当前登录用户id
//        Long userId = BaseContext.getCurrentId();
//        User user = userMapper.getById(userId);
//
//        //调用微信支付接口，生成预支付交易单
//        JSONObject jsonObject = weChatPayUtil.pay(
//                ordersPaymentDTO.getOrderNumber(), //商户订单号
//                new BigDecimal(0.01), //支付金额，单位 元
//                "苍穹外卖订单", //商品描述
//                user.getOpenid() //微信用户的openid
//        );
//
//        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
//            throw new OrderBusinessException("该订单已支付");
//        }
//
//        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
//        vo.setPackageStr(jsonObject.getString("package"));
//
//        return vo;
//    }


    //    /**
//     * 支付成功，修改订单状态
//     *
//     * @param outTradeNo
//     */
    public void paySuccess(String outTradeNo) {
//
//        // 根据订单号查询订单
//        Orders ordersDB = orderMapper.getByNumber(outTradeNo);
//
//        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
//        Orders orders = Orders.builder()
//                .id(ordersDB.getId())
//                .status(Orders.TO_BE_CONFIRMED)
//                .payStatus(Orders.PAID)
//                .checkoutTime(LocalDateTime.now())
//                .build();
//
//        orderMapper.update(orders);
//
//        //通过webSocket向客户端浏览器推送消息
//        Map map = new HashMap();
//        map.put("type", 1);//1表示来单提醒，2表示客户催单
//        map.put("orderId", ordersDB.getId());
//        map.put("content", "订单号" + outTradeNo);
//        String jsonString = JSON.toJSONString(map);
//        webSocketServer.sendToAllClient(jsonString);
//
    }

}
